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Grandio Greenhouses

Grandio Ascent 8x20 Greenhouse Kit

SKU ASCENT-820-WOOD
$4,399.00
$4,399.00

Estimated shipping time

You can typically expect your items to arrive within 4–7 business days, depending on your location and product availability.

What is your Return Policy?

At Northgrid Supply, we want every customer to shop with confidence. If something doesn’t go as planned, we’ve made returns and refunds simple and fair. Here’s how it works:

1. Return Window

You can request a return within 30 days of receiving your order. Unfortunately, we’re unable to accept returns after that time frame.

2. Who Pays for Return Shipping?

  • If your item arrives damaged, defective, or incorrect, we’ll cover the return shipping cost.
  • If you’re returning an item because you changed your mind, you’ll be responsible for return shipping fees.

3. Damaged or Defective Items

Received something broken or not working properly? Contact us within 30 days. We’ll provide a prepaid return label and once the item is returned and inspected, we’ll issue either a full refund or a replacement—including any original shipping costs.

4. Changed Your Mind?

If you no longer want the item, you can return it within 30 days—as long as it's unused, in its original packaging, and in resellable condition. You’ll need to handle the return shipping, and once we receive and inspect it, we’ll refund the product cost (excluding shipping).

5. Refund Processing

Once we receive and approve your return, we’ll send a confirmation email and issue a refund to your original payment method within 7 business days. Please allow additional time for banks or credit card companies to process and reflect the refund.

If it’s been over 10 business days since your refund was approved and you still don’t see it, contact us at support@northgridsupply.com and we’ll look into it immediately.

6. Restocking Fees

Change-of-mind returns are subject to a 25% restocking fee. Damaged, defective, or incorrect items are not charged a restocking fee.

The Grandio Ascent 8x20 Greenhouse Kit is a walk-in hobby greenhouse that provides 160 sq. ft. of growing space. It is intended for cultivating vegetables, herbs, flowers, tropical plants, seedlings, and mature plants across multiple growing areas. The greenhouse combines a 1.2 mm heavy-duty aluminum frame with 6 mm twin-wall polycarbonate panels. It includes 5 roof vents, built-in rain gutters, a steel base kit, and a snow load kit. Selectable options include Wood, Concrete, or Dirt anchoring; No Upgrade or Add Premium Upgrade; and the choice to claim or skip the free staging table. These options affect the anchoring hardware or included accessories but do not change the 8 ft. x 20 ft. greenhouse size.

  • Height: 7 ft. 9 in.
  • Width: 8 ft.
  • Length: 20 ft.
  • Frame: 1.2 mm heavy-duty aluminum
  • Frame Color: Powder-coated green
  • Door Type: Bind-resistant double sliding door
  • Latch: Easy latch with double ball catch
  • Door Dimensions: 3 ft. 6 in. x 6 ft.
  • Polycarbonate Panel Thickness: 6 mm
  • Number of Roof Vents: 5
  • Rain Gutters: Built-in
  • Steel Base Kit: Included
  • Snow Load Kit: Included
  • Optional Back Door Kit: Yes
  • Extendable: Yes
  • Anchor Options: Wood, Concrete, Dirt
  • Snow Rating: Maximum snow load of 25 lbs./ft^2 of snow
  • Wind Rating: Withstands winds up to 76 mph when anchored properly

Size Guide

  • Product Size: 8 ft. wide x 20 ft. long x 7 ft. 9 in. high
  • Growing Space: 160 sq. ft.
  • Door Size: 3 ft. 6 in. x 6 ft.

Configuration Difference: All included configurations use the same 8 ft. x 20 ft. greenhouse structure. The selectable differences are the anchoring system, Premium Upgrade package, and free staging-table choice.

  • With Steel Base

  • Heavy-Duty Frame: Constructed with a 1.2 mm heavy-duty aluminum frame featuring a powder-coated green finish.
  • Twin-Wall Panels: Equipped with 6 mm twin-wall polycarbonate panels.
  • Double Sliding Door: Features a bind-resistant double sliding door for greenhouse access.
  • Secure Door Latch: Uses an easy latch with a double ball catch.
  • Adjustable Ventilation: Includes 5 roof vents with multi-level handles for ventilation control.
  • Built-In Rain Gutters: Integrated rain gutters channel water away from the greenhouse foundation.
  • Steel Base Kit: Includes a heavy-duty powder-coated steel base kit used with the selected foundation and anchoring system.
  • Snow Load Kit: Includes a snow load kit for additional structural support.
  • Weather Ratings: Rated for a maximum snow load of 25 lbs./ft^2 and winds up to 76 mph when properly anchored.
  • Extendable Construction: The greenhouse is identified as extendable.
  • Optional Second Entrance: An optional back door transformation kit can replace the rear wall with a second entrance.

Secure & Convenient Double Sliding Doors

Advanced Ventilation & All-Weather Performance

Impressive 7'9" Height for Maximum Headroom & Vertical Space

Exceptional Year-Round Insulation

Heavy-Duty Construction & Rust Proof

Premium Upgrade

  • Roof Vent Auto Openers: 5
  • Plant Hangers: 20
  • Brillianize Anti-Static Panel Cleaner: 1
  • Trellising Kit: 1
  • Drip Irrigation Kit: 1
  • Premium Upgrade Price: $599.00

Premium Upgrade Compare-at Price: $665.00

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    Total price$7,898.00